patch.cpp revision b3c9d1c33caf325aada244204215eb790c228c12
150d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 250d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov/* 350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * Copyright 2014 Google Inc. 450d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * 550d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * Use of this source code is governed by a BSD-style license that can be 650d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov * found in the LICENSE file. 750d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov */ 850d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 950d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov#include "gm.h" 10b3c9d1c33caf325aada244204215eb790c228c12dandov#include "SkGradientShader.h" 11b3c9d1c33caf325aada244204215eb790c228c12dandov#include "SkPatchUtils.h" 12b3c9d1c33caf325aada244204215eb790c228c12dandov 13b3c9d1c33caf325aada244204215eb790c228c12dandovstatic SkShader* make_shader() { 14b3c9d1c33caf325aada244204215eb790c228c12dandov const SkColor colors[] = { 15b3c9d1c33caf325aada244204215eb790c228c12dandov SK_ColorRED, SK_ColorCYAN, SK_ColorGREEN, SK_ColorWHITE, SK_ColorMAGENTA, SK_ColorBLUE, 16b3c9d1c33caf325aada244204215eb790c228c12dandov SK_ColorYELLOW, 17b3c9d1c33caf325aada244204215eb790c228c12dandov }; 18b3c9d1c33caf325aada244204215eb790c228c12dandov const SkPoint pts[] = { { 100.f / 4.f, 0.f }, { 3.f * 100.f / 4.f, 100.f } }; 19b3c9d1c33caf325aada244204215eb790c228c12dandov 20b3c9d1c33caf325aada244204215eb790c228c12dandov return SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors), 21b3c9d1c33caf325aada244204215eb790c228c12dandov SkShader::kMirror_TileMode); 22b3c9d1c33caf325aada244204215eb790c228c12dandov} 2350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 24b3c9d1c33caf325aada244204215eb790c228c12dandovstatic void draw_control_points(SkCanvas* canvas, const SkPoint cubics[12]) { 25ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov //draw control points 26963137b75c0a1fe91f35e9826742f36309f5e65ddandov SkPaint paint; 27b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint bottom[SkPatchUtils::kNumPtsCubic]; 28b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getBottomCubic(cubics, bottom); 29b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint top[SkPatchUtils::kNumPtsCubic]; 30b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getTopCubic(cubics, top); 31b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint left[SkPatchUtils::kNumPtsCubic]; 32b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getLeftCubic(cubics, left); 33b3c9d1c33caf325aada244204215eb790c228c12dandov SkPoint right[SkPatchUtils::kNumPtsCubic]; 34b3c9d1c33caf325aada244204215eb790c228c12dandov SkPatchUtils::getRightCubic(cubics, right); 35ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 36963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorBLACK); 37b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setStrokeWidth(0.5f); 38ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov SkPoint corners[4] = { bottom[0], bottom[3], top[0], top[3] }; 39963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, bottom, paint); 40b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, bottom + 1, paint); 41963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, top, paint); 42963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, left, paint); 43963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kLines_PointMode, 4, right, paint); 44ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 45b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, top + 1, paint); 46b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, left + 1, paint); 47b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kLines_PointMode, 2, right + 1, paint); 48ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 49963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setStrokeWidth(2); 50ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 51963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorRED); 52963137b75c0a1fe91f35e9826742f36309f5e65ddandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 4, corners, paint); 53ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 54963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorBLUE); 55b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, bottom + 1, paint); 56ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 57963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorCYAN); 58b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, top + 1, paint); 59ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 60963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorYELLOW); 61b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, left + 1, paint); 62ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 63963137b75c0a1fe91f35e9826742f36309f5e65ddandov paint.setColor(SK_ColorGREEN); 64b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPoints(SkCanvas::kPoints_PointMode, 2, right + 1, paint); 65ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov} 66ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 6750d715476b1d3a00fb43c13e34a80ea0a01d32bfdandovnamespace skiagm { 6850d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov/** 69b3c9d1c33caf325aada244204215eb790c228c12dandov * This GM draws a cubics coons patch using the specialized call SkCanvas::drawPatch. 7050d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov */ 7150d715476b1d3a00fb43c13e34a80ea0a01d32bfdandovclass SkPatchGM : public GM { 72ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 7350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandovpublic: 7450d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov SkPatchGM() { 7550d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov this->setBGColor(0xFFFFFFFF); 7650d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov } 7750d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 7850d715476b1d3a00fb43c13e34a80ea0a01d32bfdandovprotected: 7950d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov virtual SkString onShortName() SK_OVERRIDE { 8050d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov return SkString("patch_primitive"); 8150d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov } 8250d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 8350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov virtual SkISize onISize() SK_OVERRIDE { 8450d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov return SkISize::Make(800, 800); 8550d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov } 8650d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 8750d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov virtual uint32_t onGetFlags() const SK_OVERRIDE { 88963137b75c0a1fe91f35e9826742f36309f5e65ddandov return kSkipTiled_Flag; 8950d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov } 90ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 9150d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE { 92ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov 9350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov SkPaint paint; 94963137b75c0a1fe91f35e9826742f36309f5e65ddandov 95963137b75c0a1fe91f35e9826742f36309f5e65ddandov // The order of the colors and points is clockwise starting at upper-left corner. 96b3c9d1c33caf325aada244204215eb790c228c12dandov const SkPoint cubics[SkPatchUtils::kNumCtrlPts] = { 97963137b75c0a1fe91f35e9826742f36309f5e65ddandov //top points 98b3c9d1c33caf325aada244204215eb790c228c12dandov {100,100},{150,50},{250,150}, {300,100}, 99963137b75c0a1fe91f35e9826742f36309f5e65ddandov //right points 100b3c9d1c33caf325aada244204215eb790c228c12dandov {250, 150},{350,250}, 101963137b75c0a1fe91f35e9826742f36309f5e65ddandov //bottom points 102b3c9d1c33caf325aada244204215eb790c228c12dandov {300,300},{250,250},{150,350},{100,300}, 103963137b75c0a1fe91f35e9826742f36309f5e65ddandov //left points 104b3c9d1c33caf325aada244204215eb790c228c12dandov {50,250},{150,150} 10550d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov }; 10650d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 107b3c9d1c33caf325aada244204215eb790c228c12dandov const SkColor colors[SkPatchUtils::kNumCorners] = { 108b3c9d1c33caf325aada244204215eb790c228c12dandov SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN 109b3c9d1c33caf325aada244204215eb790c228c12dandov }; 110b3c9d1c33caf325aada244204215eb790c228c12dandov const SkPoint texCoords[SkPatchUtils::kNumCorners] = { 111b3c9d1c33caf325aada244204215eb790c228c12dandov {0.0f, 0.0f}, {100.0f, 0.0f}, {100.0f,100.0f}, {0.0f, 100.0f}} 112b3c9d1c33caf325aada244204215eb790c228c12dandov ; 113963137b75c0a1fe91f35e9826742f36309f5e65ddandov 114b3c9d1c33caf325aada244204215eb790c228c12dandov const SkXfermode::Mode modes[] = { 115b3c9d1c33caf325aada244204215eb790c228c12dandov SkXfermode::kSrc_Mode, 116b3c9d1c33caf325aada244204215eb790c228c12dandov SkXfermode::kDst_Mode, 117b3c9d1c33caf325aada244204215eb790c228c12dandov SkXfermode::kModulate_Mode, 118b3c9d1c33caf325aada244204215eb790c228c12dandov }; 119963137b75c0a1fe91f35e9826742f36309f5e65ddandov 120b3c9d1c33caf325aada244204215eb790c228c12dandov SkAutoTUnref<SkShader> shader(make_shader()); 121b3c9d1c33caf325aada244204215eb790c228c12dandov 122b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->save(); 123b3c9d1c33caf325aada244204215eb790c228c12dandov for (int y = 0; y < 3; y++) { 124b3c9d1c33caf325aada244204215eb790c228c12dandov SkAutoTUnref<SkXfermode> xfer(SkXfermode::Create(modes[y])); 125b3c9d1c33caf325aada244204215eb790c228c12dandov 126b3c9d1c33caf325aada244204215eb790c228c12dandov for (int x = 0; x < 4; x++) { 127b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->save(); 128b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->translate(x * 350.0f, y * 350.0f); 129b3c9d1c33caf325aada244204215eb790c228c12dandov switch (x) { 130b3c9d1c33caf325aada244204215eb790c228c12dandov case 0: 131b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPatch(cubics, NULL, NULL, xfer, paint); 132b3c9d1c33caf325aada244204215eb790c228c12dandov break; 133b3c9d1c33caf325aada244204215eb790c228c12dandov case 1: 134b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPatch(cubics, colors, NULL, xfer, paint); 135b3c9d1c33caf325aada244204215eb790c228c12dandov break; 136b3c9d1c33caf325aada244204215eb790c228c12dandov case 2: 137b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setShader(shader); 138b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPatch(cubics, NULL, texCoords, xfer, paint); 139b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setShader(NULL); 140b3c9d1c33caf325aada244204215eb790c228c12dandov break; 141b3c9d1c33caf325aada244204215eb790c228c12dandov case 3: 142b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setShader(shader); 143b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->drawPatch(cubics, colors, texCoords, xfer, paint); 144b3c9d1c33caf325aada244204215eb790c228c12dandov paint.setShader(NULL); 145b3c9d1c33caf325aada244204215eb790c228c12dandov break; 146b3c9d1c33caf325aada244204215eb790c228c12dandov default: 147b3c9d1c33caf325aada244204215eb790c228c12dandov break; 148b3c9d1c33caf325aada244204215eb790c228c12dandov } 149b3c9d1c33caf325aada244204215eb790c228c12dandov 150b3c9d1c33caf325aada244204215eb790c228c12dandov draw_control_points(canvas, cubics); 151b3c9d1c33caf325aada244204215eb790c228c12dandov canvas->restore(); 152b3c9d1c33caf325aada244204215eb790c228c12dandov } 153ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov } 154ecfff21bde1f0ca3c36533eded325066b5f2d42ddandov canvas->restore(); 15550d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov } 15650d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 15750d715476b1d3a00fb43c13e34a80ea0a01d32bfdandovprivate: 15850d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov typedef GM INHERITED; 15950d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov}; 16050d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 161ecfff21bde1f0ca3c36533eded325066b5f2d42ddandovDEF_GM(return SkNEW(SkPatchGM); ) 16250d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov 16350d715476b1d3a00fb43c13e34a80ea0a01d32bfdandov} 164